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Posted to issues@flink.apache.org by "Nico Kruber (JIRA)" <ji...@apache.org> on 2018/05/24 15:27:00 UTC

[jira] [Created] (FLINK-9435) Remove per-key selection Tuple instantiation via reflection in KeySelectorUtil#ComparableKeySelector

Nico Kruber created FLINK-9435:
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             Summary: Remove per-key selection Tuple instantiation via reflection in KeySelectorUtil#ComparableKeySelector
                 Key: FLINK-9435
                 URL: https://issues.apache.org/jira/browse/FLINK-9435
             Project: Flink
          Issue Type: Improvement
          Components: Streaming
    Affects Versions: 1.4.2, 1.4.1, 1.3.3, 1.3.2, 1.4.0, 1.3.1, 1.3.0, 1.5.0, 1.6.0
            Reporter: Nico Kruber
            Assignee: Nico Kruber


Every {{ComparableKeySelector#getKey()}} call currently creates a new tuple from {{Tuple.getTupleClass(keyLength).newInstance();}} which seems expensive. Instead, we could get a template tuple and use {{Tuple#copy()}} which copies the right sub-class in a more optimal way.



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